@phdthesis{BJHTUP11_1989__0252__P0_0,
     author = {Heurteaux, Yanick},
     title = {In\'egalit\'es de {Harnack} \`a la fronti\`ere pour des op\'erateurs paraboliques},
     series = {Th\`eses d'Orsay},
     publisher = {Universit\'e de Paris-Sud Centre d'Orsay},
     number = {252},
     year = {1989},
     language = {fr},
     url = {http://www.numdam.org/item/BJHTUP11_1989__0252__P0_0/}
}